Answer Happy

5. a) (5 pts) Using the IR with the Wittp reaction, how can you tell if the starting Cwo has completely reacted to give an alkeno? What peak(s) in the starting material would disappear? What peaks(s) would appear in the product? b) (5 pts) Using the 'H NMR with the Wittig reaction, how can you tell if you got a cis or trans double bond? You don't have to give specific numbers: you can describe it in general terms. c) (5 pts) in the Grignard experiment it said, "Pour the ether layer into a clean, dry Erlenmeyer flask and add 1 g of sodium sulfate." What is the purpose of the sodium sulfate? d) (5 pts) In the Williamson Ether Synthesis it said, "Turn off the heat, raise the vial and attachments and let the mixture cool to room temperature. Filter the mixture by gravity, using a thick-stemmed funnel." What was the purpose of that gravity filtration? Be as specific as possible.